MAKE has a piece on Jeff Hoefs' fetish for turning Nintendo controllers into musical instruments. "He's made PowerPad midi keyboards, PowerGlove music controllers and Nintendo Uforce controllers to create music." He describes his experience hacking the PowerPad as "fairly simple" and touts the Pad's newfound ability to connect to a synth, drum machine or computer. Unfortunately, any perceived cool factor quickly falls asunder to utter nerdiness:

For example, in one mode I could make a fist and dance out a simple beat on the pad, then when I opened my hand, the beat would continue as a loop, I could then add additional layers to the loop by repeating the process.

Sas some more pictures and a pretty detailed explanation of his triumph are available over at MAKE.